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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 153 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A water tank holds 820 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹680 to ₹510. By what percent did it come down?
  3. 3.A water tank holds 800 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  5. 5.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  6. 6.A water tank holds 2540 litres. 20% of the water is used. How many litres are left?
  7. 7.A shop sells 4200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  8. 8.A water tank holds 1460 litres. 40% of the water is used. How many litres are left?
  9. 9.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹3180 to ₹3339. By what percent did it go up?
  12. 12.The price of a bicycle is ₹2560. It goes up by 20%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹460 to ₹690. By what percent did it go up?
  14. 14.A town has 1360 people. Its population grows by 50%. How many people live there now?
  15. 15.A shop sells 3500 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  16. 16.The price of a bicycle is ₹3660. It goes up by 50%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3720. It goes up by 50%. What is the new price (in ₹)?
  18. 18.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.A town has 2040 people. Its population grows by 50%. How many people live there now?
  20. 20.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹2220 to ₹2553. By what percent did it go up?
  22. 22.A shop sells 1280 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹700 to ₹665. By what percent did it come down?
  24. 24.A town has 1800 people. Its population grows by 50%. How many people live there now?
  25. 25.The price of a bicycle is ₹1940. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹720 to ₹828. By what percent did it go up?
  27. 27.A shop sells 2000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹1480 to ₹1036. By what percent did it come down?
  29. 29.A shop sells 880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.A shop sells 2500 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹4720 to ₹6136. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹2560 to ₹2048. By what percent did it come down?
  33. 33.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹440 to ₹572. By what percent did it go up?
  35. 35.The price of a bicycle is ₹1220. It goes up by 5%. What is the new price (in ₹)?
  36. 36.A shop sells 1320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹4060 to ₹4263. By what percent did it go up?
  39. 39.A water tank holds 200 litres. 30% of the water is used. How many litres are left?
  40. 40.A town has 1080 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 779
  2. 25
  3. 680
  4. 3726
  5. 27.75
  6. 2032
  7. 5880
  8. 876
  9. 37.5
  10. 95
  11. 5
  12. 3072
  13. 50
  14. 2040
  15. 3675
  16. 5490
  17. 5580
  18. 9.75
  19. 3060
  20. 110
  21. 15
  22. 1664
  23. 5
  24. 2700
  25. 2134
  26. 15
  27. 2300
  28. 30
  29. 924
  30. 3125
  31. 30
  32. 20
  33. 50
  34. 30
  35. 1281
  36. 1452
  37. 61
  38. 5
  39. 140
  40. 1242

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